Re: Storage server

[Veljko <veljko3@gmail.com>]

On Thu, Sep 13, 2012 at 06:24:45PM -0500, Stan Hoeppner wrote:
> Due to its allocation group design, continually growing an XFS
> filesystem in such small increments, with this metadata heavy backup
> workload, will yield very poor performance.  Additionally, putting an
> XFS filesystem atop an LV is not recommended as it cannot properly align
> journal write out to the underlying RAID stripe width.  While this is
> more critical with parity arrays, it also effects non parity striped arrays.
> 
> Thus my advice to you is:
> 
> Do not use LVM.  Directly format the RAID10 device using the mkfs.xfs
> defaults.  mkfs.xfs will read the md configuration and automatically
> align the filesystem to the stripe width.
> 
> When the filesystem reaches 85% capacity, add 4 more drives and create
> another RAID10 array.  At that point we'll teach you how to create a
> linear device of the two arrays and grow XFS across the 2nd array.

I did what you advised and formated RAID10 using xfs defaults.

Thanks for you help, Stan.

Regards,
Veljko